package demo;

import java.util.Scanner;

 class Lft{
     double length;
     double width;
     double height;

     public Lft() {
     }

     public Lft(double length, double width, double height) {
         this.length = length;
         this.width = width;
         this.height = height;
     }

     public void tj(double l,double w,double h){
         if(l > 0 && w > 0 && h > 0){
             System.out.println(String.format("%.2f",l * w * h));
         }
     }

 }
public class Exec3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Lft lft = new Lft();
        lft.length = scanner.nextDouble();
        lft.width = scanner.nextDouble();
        lft.height = scanner.nextDouble();
        lft.tj(lft.length, lft.width, lft.height);
    }
}
